-
公开(公告)号：US20230128630A1
公开(公告)日：2023-04-27
申请号：US17499735
申请日：2021-10-12
IPC分类号： H02M5/293 , H02M5/22 , H02M1/42 , H02M7/5395
摘要： An power converter includes an unfolder connected to a three-phase source and has an output connection with a positive terminal, a negative terminal and a neutral terminal. The unfolder creates two unipolar piece-wise sinusoidal DC voltage waveforms offset by a half of a period. A three-input converter connected to the unfolder produces a quasi-sinusoidal output voltage across output terminals. Switches of the converter selectively connect the positive, negative and neutral inputs across the output terminals. A PWM controller controls a first duty ratio and a second duty ratio for the converter based on a phase angle of the source and a modulation index generated from an error signal related to a control variable. The duty ratios are time varying with a fundamental frequency of the source. The modulation index relates to output voltage of the converter, peak voltage or current of the source and/or peak current at the output terminals.
-
公开(公告)号：US20230122886A1
公开(公告)日：2023-04-20
申请号：US17702682
申请日：2022-03-23
发明人： Yang Jiao , Johan Strydom
摘要： In one example, a controller circuit is configured to: receive a first measurement signal representing a power converter input voltage; receive a second measurement signal representing a power converter output voltage; receive an indication of whether a voltage across a switch is positive during a state change of the switch; based on the first and second measurement signals and the indication, determine: a charging interval; a first dead time interval after the charging interval; a discharging interval; and a second dead time interval after the discharging interval; and provide a first control signal at the first control output, and provide a second control signal at the second control output, in which the states of the first and second control signals vary across the charging interval, the first and second dead time intervals, and the discharging the interval.
-
公开(公告)号：US11632039B2
公开(公告)日：2023-04-18
申请号：US17458675
申请日：2021-08-27
发明人： Yuta Endo , Takato Sugawara
摘要： An integrated circuit for a power supply circuit. The integrated circuit includes an oscillator circuit configured to output an oscillator voltage that rises with a predetermined slope from a first voltage, upon an inductor current of the power supply circuit becoming smaller than a first predetermined value, an error voltage output circuit configured to output an error voltage corresponding to a difference between a reference voltage and a feedback voltage corresponding to the output voltage, a drive circuit configured to turn on and off a transistor of the power supply circuit respectively upon the inductor current becoming smaller than the first predetermined value, and upon the oscillator voltage reaching a second voltage that is based on the error voltage, and an output circuit configured to change the first and/or second voltage based on a rectified voltage obtained by full-wave rectification of the AC voltage, and to output the changed voltage.
-
公开(公告)号：US20230116031A1
公开(公告)日：2023-04-13
申请号：US17498590
申请日：2021-10-11
发明人： Milind Chandra Gupta
摘要： A method includes comparing a ramp signal with an output signal of an error amplifier to determine an initial turn-on time of a boost converter, generating a turn-on time of the boost converter through multiplying the initial turn-on time by a predetermined constant greater than or equal to 1, and maintaining a switching frequency of the boost converter substantially constant through varying a value of the predetermined constant.
-
公开(公告)号：US20230114387A1
公开(公告)日：2023-04-13
申请号：US17914248
申请日：2021-03-22
发明人： Philippe BOISSIERE
摘要： Disclosed is a method for calibrating an AC/DC converter with power factor correction, including the following steps: - connecting the input connector of the converter to a predetermined DC voltage power supply, such that this predetermined DC voltage is applied between the terminals of the input connector; - measuring, with a voltage measuring unit, the resulting calibration DC voltage which is delivered by the switching module when the predetermined DC voltage is applied between the terminals of the input connector; and -calibrating the voltage measuring unit by performing a calibration bringing the resulting calibration voltage back to the level of the predetermined DC voltage.
-
公开(公告)号：US11626794B2
公开(公告)日：2023-04-11
申请号：US17204603
申请日：2021-03-17
申请人： NXP USA, Inc.
摘要： Various embodiments relate to a current loop controller configured to control a boost converter, including: an amplifier configured to scale a measured current; a subtractor configured to subtract the scaled measured current from a desired current and to output an error signal; a controller including an integral part and a proportional part configured to produce a control signal based upon the error signal; a measuring circuit configured to measure the actual switching period of the boost converter; and a switch signal generator configured to produce a switching signal based upon the control signal and the measured actual switching period, wherein the switch signal controls the boost converter.
-
公开(公告)号：US20230086600A1
公开(公告)日：2023-03-23
申请号：US17478500
申请日：2021-09-17
申请人： NXP USA, Inc.
摘要： Stable switching is disclosed for a power factor correction boost converter using an input voltage and an output voltage. In one example, a boost converter control system includes a gate driver coupled to a switch of a boost converter to generate a drive signal to control switching of the switch, wherein a period of the drive signal is adjusted using a current adjustment signal. A current control loop is coupled to the gate driver to receive a sensed input current from the boost converter and a desired input current and to generate the current adjustment signal to the gate driver. A current limiter is coupled to the gate driver and the current control loop to determine a duty cycle of the switch, to determine a maximum input current in response to the duty cycle, and to restrict the desired input current to below the maximum input current.
-
公开(公告)号：US20230077967A1
公开(公告)日：2023-03-16
申请号：US17947024
申请日：2022-09-16
IPC分类号： H02J13/00 , H02J3/38 , H02M1/42 , G05B19/042
摘要： A method for operating a microgrid using a distributed energy resource (DER) controller determines an output power value of a DER. The method also receives a remote power correction value from a second DER controller. The method further determines a local output power reference value as a function of the output power value and the remote power correction value. The method further determines a frequency set point as a function of the local output power reference value and a droop coefficient. The method further adjusts an output frequency of the DER as a function of the frequency set point.
-
公开(公告)号：US11606025B2
公开(公告)日：2023-03-14
申请号：US17365649
申请日：2021-07-01
发明人： Raymond Blane
摘要： A power factor correction “PFC” circuit for use in AC-DC conversion comprises first and second pairs of switches connected across input and output rails in a full bridge configuration, and a controller configured to control the operation of the switches such that one pair of switches is switched on and off at an AC input frequency and the other pair of switches is switched on and off at high frequency; and the switching frequency is alternated between the pairs of switches every n cycles of the AC input/output frequency. The circuit may include inductors on both input rails and may be used in a bidirectional power supply.
-
10.发明申请公开(公告)号：US20230074022A1
公开(公告)日：2023-03-09
申请号：US17470221
申请日：2021-09-09
发明人： Rui ZHOU , Yincan MAO , Qianqian JIAO , Alap SHAH , Jianwu CAO
摘要： Power converters with power factor correction circuits and controllers thereof that are configured to generate frequency-adjustable first and second pulsed signals having respective and complementary phases separated by an adjustable deadtime. For example, a power converter may be configured to receive an alternating current (AC) input signal and output a direct current (DC) output signal. The power converter may include at least one DC/DC converter and a power factor correction circuit. The power factor correction circuit may include a first switching transistor comprising a first gate; a second switching transistor in series with the first switching transistor and comprising a second gate; and a controller configured to generate first and second pulsed signals having respective and complementary phases and separated by an adjustable deadtime and apply the generated first and second pulsed signals to the first and second gates, respectively.
-
-
-
-
-
-
-
-
-
搜索结果
4042 条记录 (耗时 0.06 秒)